More than 6,000 people have been left homeless and hundreds are missing after a dam collapsed in Laos, a country in Southeast Asia.
The dam collapsed late on Monday night and sent flash floods through villages in the area, causing lots of devastation.
It is thought that the dam released about five billion cubic metres (five trillion litres) of water when it collapsed.
The dam was a hydroelectric dam, being built to provide energy.
It is not yet known how many people have died in the disaster.
It is thought heavy rainstorms had caused part of the dam to collapse.